Atrial Dysrhythmias
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Multifocal Atrial Tachycardia

Multifocal Atrial Tachycardia

Multifocal Atrial Tachycardia is just a faster version of Wandering Atrial Pacemaker. The criteria is the same as Wandering Atrial Pacemaker with the only difference being the heart rate exceeds 100 bpm.

These changes in the locus of stimulation within the atria affect the morphology of the P waves.

Remember, you must observe at least three different shaped P waves.

Due to the presence of irregular R to R intervals coupled with the changing P wave morphology, some people have confused this rhythm with Atrial Fibrillation.

Multifocal Atrial Tachycardia

Multifocal Atrial Tachycardia is just a faster version of Wandering Atrial Pacemaker. The criteria is the same as Wandering Atrial Pacemaker with the only difference being the heart rate exceeds 100 bpm.

These changes in the locus of stimulation within the atria affect the morphology of the P waves.

Remember, you must observe at least three different shaped P waves.

Due to the presence of irregular R to R intervals coupled with the changing P wave morphology, some people have confused this rhythm with Atrial Fibrillation.